Section 15 Base metals and articles of base metal 81 Other base metals; cements; articles thereof 81 01 Tungsten (wolfram) and articles thereof, including waste and scrap Commodity Code Description 81 01 10 - Powders 81 01 94 - - Unwrought tungsten, including bars and rods obtained simply by sintering 81 01 96 - - Wire 81 01 97 - - Waste and scrap 81 01 99 - - Other